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Given the ever-growing need for robotics learning, an experimental teaching model was developed in combination with virtual reality, remote control and an on-site laboratory to support robotic kinematics teaching. Based on the Browser/Server mode, a kinematics simulation platform of a 6-DOF articulated robot and a 4-DOF SCARA robot was established. Furthermore, a Client/Server mode SCARA robot's remote-control system was developed along with a simulation with the same functionality and interface. Experiments with virtual reality simulation can eliminate the safety concerns associated with real-world robot operations. Test resources can be web-shared for wider audiences. Remote-controlled experiments could operate the robot off-site and achieve the same results as on-site operations. Virtual reality and remote-controlled experiments could also alleviate the shortages of lab time, space, equipment, staff and teaching time. Students could choose one of the three modes to examine the effectiveness of their study, or they could first use simulations and later operate robots on-site or remotely and obtain real-world experimental results. The various testing combinations available to learners would improve the flexibility, effectiveness and safety of experiments and would meet various learners' needs. [ABSTRACT FROM AUTHOR]

Objective: To assess the relationship between dietary intake of α -carotene, β -carotene, β -cryptoxanthin, lycopene and lutein+zeaxanthin (LZ) and occurrence of metabolic dysfunction-associated fatty liver disease (MAFLD)., Design: Cross-sectional study design. The MAFLD diagnosis was based on hepatic steatosis and metabolic dysregulation. Carotenoid intake was adjusted for using an energy-adjusted model. Logistic regression and restricted cubic spline (RCS) analyses were used to assess the relationships, with sensitivity analysis to validate the findings. Weighted quantile sum regression (WQS) was used to explore the combined effect of these carotenoids on MAFLD. Subgroup analyses were conducted to identify population-specific associations., Setting: National Health and Nutrition Examination Survey (NHANES) 2017-March 2020., Participants: This study included 5098 individuals aged 18 years and older., Results: After adjusting for potential confounders, a weak inverse association was observed between α -carotene and β -carotene intakes and MAFLD occurrence (all P value <0·05). The highest quartile of β -carotene intake showed a significantly lower occurrence of MAFLD compared with the lowest quartile (OR = 0·65; 95 % CI: 0·44, 0·97). RCS analysis showed that a significantly lower occurrence of MAFLD was associated with a higher intake of the four carotenoids, excluding lycopene. Furthermore, the WQS analysis revealed a negative relationship between combined carotenoid intake and MAFLD occurrence (OR = 0·95, 95 % CI: 0·90, 1·00, P = 0·037). Subgroup analyses showed dietary carotenoid intake was associated with reduced MAFLD occurrence in populations aged 50-69 years, females, physically active individuals and non-drinkers., Conclusion: Higher dietary intake of carotenoids is associated with lower MAFLD occurrence. However, this relationship varies among individuals of different ages, sexes and lifestyles.